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Regenerative Rights-of-Way: Local Harvests and Enhancements
in Our Community Commons by Brad Lancaster
www.HarvestingRainwater.com www.DesertHarvesters.org
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1904 2007
Tucson, Arizona and the Santa Cruz river
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Maintaining the path destructing rivers and futures
The CAP canal (and its pumps) is the single largest consumer of electricity, and the single largest emitter of carbon in the state of Arizona (at the coal-burning plant
generating the power it consumes) ���
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1996 Dunbar/Spring Annual Neighborhood tree planting
began
Trees planted in basins to capture rainfall and
runoff from the adjoining path
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Path to Scarcity Path to Abundance
• Turns resources into wastes
• Relies on the costly and imported
• Consumes more than it produces
• Disintegrated Drains
• Turns “wastes” into resources
• Relies on the free and local
• Produces more than it consumes
• Integrated Harvests
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We selected native, multi-use, low-water-use, shade trees for maximum potentials
VELVET MESQUITE (Prosopis velutina)
SCREWBEAN MESQUITE (Prosopis pubescens)
DESERT IRONWOOD (Olneya tesota)
CANYON HACKBERRY (Celtis reticulata)
FOOTHILLS PALO VERDE (Cercidium microphyllum)
BLUE PALO VERDE (Cercidium floridum)
DESERT WILLOW (Chilopsis linearis)
CAT CLAW ACACIA (Acacia greggii)
WHITE THORN ACACIA (Acacia constricta)
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Native plants attract more beneficial native wildlife
Native velvet mesquites do not blow over or get their
branches broken like South American varieties and
hybrids do
Native velvet mesquite pods typically taste best
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San Xavier Cooperative Farm
harvests and sells mesquite flour
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4th annual Cascabel Hermitage Association
mesquite milling & pancake &
waffle breakfastCascabel, Arizona
2002
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1st annual Dunbar/Spring Mesquite Fiesta, 2003
3 griddles and 3 pancake flippers
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The idea germinates to harvest stormwater as well as rainwater to
turn a flooding liability into an irrigation asset
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In Tucson, AZ (receiving less than 12 inches of annual rainfall) One mile of an average residential street drains over
ONE MILLION GALLONS of rainfall per year. That’s enough water to sustainably irrigate 400 native food trees per mile,
or one tree every 25 feet on both sides of the street - irrigated by the street.
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2004 - 2005 curb cuts and street runoff harvesting began
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^ 1994
2006 >
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16
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Curb cuts legalized in 2007$45 permit
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Curb core hole 4-inch (100-mm) diameter
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Public right-of-ways must not be limited to
private utility right-of-ways
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Chipped and Mulchy
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Prunings from tree used as mulch to fertilize tree and
increase soil moisture
12 to 14% of the city’s solid waste stream is yard trimmings
Brush and Bulky transformed into Chipped and Mulchy
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Trees with associated water-harvesting basins grow to be 33% larger than trees without such basins.
Basin trees sequester 1,754 kg/tree of carbon Non-basin trees sequester 678 kg/tree of carbon
REFERENCE: Soil’s Role in Processing Pollutants for Air and Water: Case Studies of Green Infrastructure and Carbon Sequestration by Mitch Pavao Zuckerman webinar on 01/24/2013 http://www.watershedmg.org/soil-stewards
Deeper, vertically-mulched basins are harvesting much more water than shallower trees and supporting even more growth
22
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Mitchell Pavao-Zuckerman���Biosphere 2 & School of Natural Resources and Environment���University of Arizona [email protected]
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Mitchell Pavao-Zuckerman���Biosphere 2 & School of Natural Resources and Environment���University of Arizona [email protected]
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Dunbar/Spring neighborhood intersection repair, 2006
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Our Walk Score from www. WalkScore.
com
27
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Gila Monster bench by Hiro Tashima next to neighborhood book nook
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The neighborhood now annually harvests over 660,000 gallons (2 acre feet) of stormwater
in the public right-of-way within 10 water-harvesting traffic circles, 33 chicanes, and 85 street-side
basins fed by 50 curb cuts and 35 cores
But we could, and need to, increase that harvest by at least 20 times
Before ^
After >
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Watershed maps are natural community maps
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Economic Engine:neighborhood harvesters can make $25 per hour harvesting, milling, and
then selling mesquite pods grown in their own
neighborhoods
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32
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8th annual Desert HarvestersMesquite Fiesta 2010
Three hammermills milling pods, community pod sorting, and taste tests
photos by Ruben Ruiz
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2011 Desert Harvesters
Mesquite Fiesta Bake Sale
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Native and wild foods and medicinals
vendors���
Monsoon Kitchen, Mesquitery, Desert Tortoise Botanicals,
Native Seeds/SEARCH, ���Bean Tree Farms, ���
Desert Survivors Nursery
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Solar cooking demonstrations,
native food-bearing Christmas trees,
Arizona Native Plant Society,
Wildlife whose habitat we are reestablishing
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Non-profits and community efforts helping enhance our community’s water,
food, health, and cultural resilience
Living Streets Alliance, Watershed Management Group, BASA, Tasty Community Stories
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Lost Sonoran Sucker fish and water-harvesting Horned Lizard
sculpture by Joseph Lupiani in a water-harvesting
traffic-calming chicane
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DesertHarvesters.org and
HarvestingRainwater.com
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< 1996 Planting
2006 > Harvesting